Question 1

The objective of maintenance and reliability is to maintain the capability of the system.

Accepted Answer

The main objective of maintenance and reliability is to ensure that the system is able to perform its intended functions effectively and efficiently over its useful life. This involves implementing strategies and practices that prevent or minimize the occurrence of failures, reduce downtime and repair costs, extend the life of equipment, and optimize the overall performance of the system. By maintaining the capability of the system, organizations can achieve higher levels of productivity, profitability, safety, and customer satisfaction.

Question 2

If the mean time between failures has been calculated to be 2,000 hours, then FR(N) = 0.005 failures/unit-hour.

Accepted Answer

False

Question 3

Reliability is the probability that a machine part or product will function properly for a specified time regardless of conditions.

Accepted Answer

Reliability is the probability that a machine part or product will function properly for a specified time under stated conditions, not regardless of conditions. Conditions such as operating environment, maintenance, and usage intensity significantly affect reliability.

Question 4

The Orlando Utilities Commission uses a computerized maintenance management program and devotes significant dollar and labor resources to power plant maintenance, because the costs of unexpected failure are incredibly high.

Accepted Answer

The statement mentions that the Orlando Utilities Commission uses a computerized maintenance management program and devotes significant dollar and labor resources to power plant maintenance to avoid unexpected failure, indicating that the costs of unexpected failure are high. Therefore, the statement is true.

Question 5

Describe how the Orlando Utilities Commission obtains competitive advantage through its maintenance practices.

Accepted Answer

The answer of Describe how the Orlando Utilities Commission obtains...

Question 6

Define reliability.

Accepted Answer

The answer of Define reliability....

Question 7

Which of the following is a reliability tactic?
A) improving individual components
B) F increasing repair speed
C) providing redundancy
D) A and C
E) A, B, and C

Accepted Answer

Improving individual components (option A) can increase overall reliability, but it may not be enough to prevent all failures. Providing redundancy (option C) can help to ensure that the system can continue to function even if there is a failure in one component. Therefore, using both tactics (option D) provides a strong approach to improving the reliability of a system. Increasing repair speed (option B) can help to reduce downtime but may not necessarily prevent failures.

Question 8

Define maintenance.

Accepted Answer

The answer of Define maintenance....

Question 9

The MTBF (mean time between failures) is calculated as the reciprocal of the number of failures during a period of operating time.

Accepted Answer

The MTBF is calculated as the total operating time divided by the number of failures during that time.

Question 10

Which of the following statements about maintenance at the Orlando Utilities Commission is FALSE?
A) There are at least two types of preventive maintenance, including an annual maintenance and a less frequent overhaul schedule.
B) Its preventive maintenance program has earned the company top rankings and its competitive advantage.
C) Each power-generating unit is taken off-line every three years for a complete overhaul.
D) Each of its power-generating units is taken off-line for maintenance every one to three weeks.
E) Costs associated with breakdowns are several times higher than costs arising from preventive maintenance.

Accepted Answer

The statement "Each of its power-generating units is taken off-line for maintenance every one to three weeks" is false, as it contradicts the statement in option C that each power-generating unit is taken off-line every three years for a complete overhaul.

Question 11

________ is the probability that a machine part or product will function properly for a specified time under stated conditions.

Accepted Answer

The answer of ________ is the probability that a machine...

Question 12

________ consists of all activities involved in maintaining capability of the system.

Accepted Answer

The answer of ________ consists of all activities involved in...

Question 13

The objective of maintenance and reliability is to:
A) ensure that breakdowns do not affect the quality of the products.
B) ensure that no breakdowns will ever occur.
C) ensure that preventive maintenance costs are kept as low as possible.
D) maintain the capability of the system.
E) ensure that maintenance employees are fully utilized.

Accepted Answer

The objective of maintenance and reliability is to maintain the capability of the system, which means ensuring that the equipment, machinery or system is able to perform its intended function whenever required. This can be achieved through regular inspections, preventive maintenance, and timely repairs or replacements. The other choices are not completely accurate as no maintenance strategy can completely eliminate breakdowns or ensure zero maintenance costs or fully utilize employees.

Question 14

Maintenance includes all activities involved in maintaining capability of the system.

Accepted Answer

Maintenance is the process of ensuring the system retains its capability and functions as intended.

Question 15

At the Orlando Utilities Commission, overhauls are scheduled for summer and winter.

Accepted Answer

The answer of At the Orlando Utilities Commission, overhauls are...

Question 16

Identify the two reliability tactics and the two maintenance tactics.

Accepted Answer

The answer of Identify the two reliability tactics and the...

Question 17

The product failure rate FR(%) is the percent of failures among the total number of products tested.

Accepted Answer

The statement is true. The product failure rate is calculated by dividing the number of failed products by the total number of tested products and expressing the answer as a percentage.

Question 18

The reliability of a system in which each individual component must function in order for the entire system to function, and in which each component has its own unique reliability, independent of other components, is the sum of the probabilities of each of those components.

Accepted Answer

The reliability of a system in which each individual component must function in order for the entire system to function, and in which each component has its own unique reliability, independent of other components, is determined by the product of the probabilities of each component. This is known as the "product rule" for reliability.

Question 19

What is the probability that a product will function properly for a specified time under stated conditions?
A) functionality
B) maintenance
C) durability
D) reliability
E) fitness for use

Accepted Answer

The probability that a product will function properly for a specified time under stated conditions is the definition of reliability.

Question 20

The reliability tactics include implementing or improving preventive maintenance as well as increasing repair capabilities or speed.

Accepted Answer

The answer of The reliability tactics include implementing or improving...

Quiz 16: Maintenance and Reliability